Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
To multiplex the digits is to illuminate one digit at a time. The rotation is done rapidly. Persistence of vision causes our eyes to perceive the entire display as though all digits are lit simultaneously.
This provides benefits:
* only one driver IC is needed (rather than several)
* reduced current need (because only one digit is ever lit, rather then all digits simultaneously).
Seven data wires come from the driver IC. These fan out directly to all the digits.
However each digit's path to ground is also turned on and off by an individual control wire, coming from the driver IC.
in this case multiplexing can be defined as a way to send data from one source to several 7 segment displays using common lines, it has to be done very fast because only one display is energized at a time, but the speed form the ilusion of all dispays being energized at the same time
You can use any one port to send data to the 7 segment and another one port to control the "COM" terminal of 7 segment.
.
.
check out this link for image of multiplexing of 7 Segment on "Proteus(Simulation Software)".
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
